Socket Type 359. Stores reference no. 10H/2206. Large brown bakelite socket that was wired into the aircraft at the different crew positions. This enabled aircrew to plug their flying helmets into the aircraft 's radio system. Just the socket with no wiring loom. The 'bell' jackplug is pictured for reference purposes only and are not included in the sale. Unused old stock. We have just one remaining. Stock code H20821-5.